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Thanks for the identification.
I think you might have two different individuals here! :) The first image is Nomada as identified by Urophora, but the second looks like a sawfly (Symphyta) to me.
You are absolutely right - I did not look at the second pic at all. It is a sawfly.
Ooops! Sorry if I posted pics of two different species and thanks for your comments and identifications.
Lat/Lng: 52.7, 0.3
OS grid ref: TF5820